Power Nap - Working as Advertised?

Discussion in 'OS X Mountain Lion (10.8)' started by EnigMoiD, Jul 27, 2012.

  1. EnigMoiD macrumors member

    Aug 10, 2007
    Maybe I'm misinterpreting Apple's claims, but it makes sense that Power Nap would continue a time machine backup / app store download that is already in progress.

    When I close my 2012 MBA, my time machine hard drive stops blinking, so I can only imagine that the backup has stopped. Is this supposed to happen? Will Power Nap only initiate backups on a schedule? Or is this not how it's supposed to work? I installed the SMC update and checked the Power Nap box in energy saver.

    This can also become a thread about Power Nap in general since there doesn't seem to be one.
  2. ayeying macrumors 601


    Dec 5, 2007
    Yay Area, CA
    I don't think it continues the back up or download but will resume or will download/back up at a scheduled time. If it's already running, it will stop and sleep since that's what you really need when putting a system to sleep in the first place.
  3. The "Dude" macrumors regular

    Sep 29, 2011
    Negative. My Time Machine preferences said it was scheduled to do a backup at 9:01pm. I closed the lid on my rMBP a few minutes before that and opened it up afterwards. The backup didn't happen. And yes I'm sure I have power nap enabled when plugged into a power source (which it was).
  4. Macman45 macrumors G5


    Jul 29, 2011
    Somewhere Back In The Long Ago
    TM backups work fine in power nap on my MBA...maybe the retina patch didn't work.
  5. KingArthurVI macrumors regular


    Dec 17, 2011
    Minneapolis, MN
    Same here, I thought it would "continue to run Time Machine backups" as advertised so I left my rMBP on power adapter and started the backup, then went to bed. The next day when I wake my Mac from sleep it showed the error message "the disk was not ejected properly", so I plugged out and plugged in my external HDD again to see if it backed itself up last night and no, the latest backup was before I put my Mac to sleep.

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